/*
 * Copyright (c) 1999-2003, Carnegie Mellon University. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. Products derived from the software may not be called "iVProg",
 *    nor may "iVProg" appear in their name, without prior written
 *    permission of Carnegie Mellon University.
 * 
 * 4. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes software developed by Carnegie Mellon University"
 */

package edu.cmu.cs.stage3.alice.core.question.userdefined;

import edu.cmu.cs.stage3.alice.core.property.ElementArrayProperty;

public abstract class Composite extends Component {
 public final ElementArrayProperty components = new ElementArrayProperty( this, "components", null, Component[].class );

 protected Object[] execute( ElementArrayProperty eap ) {
  for( int i=0; i<eap.size(); i++ ) {
   Component component = (Component)eap.get( i );
   Object[] value = component.execute();
   if( value != null ) {
    return value;
   }
  }
  return null;
 }

 //Rem @Override
 public Object[] execute() {
  return execute( components );
 }

}
